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A 10.0mL sample of hydrochloric acid, HCl is titrated with a standard 0.202mol/L solution of NaOH. HCl(aq)+NaOH(aq)H2O(()+NaCl(aq) Phenolphthalein is the indicator. It turns from colourless

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A 10.0mL sample of hydrochloric acid, HCl is titrated with a standard 0.202mol/L solution of NaOH. HCl(aq)+NaOH(aq)H2O(()+NaCl(aq) Phenolphthalein is the indicator. It turns from colourless to pink at the endpoint of the reaction. 13.0mL of NaOH is used. What is the concentration of the acid? 0.263mol/L1.55mol/L0.155mol/L0.644mol/L

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